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Conventional Versus High Energy Receiving And Step-Up Diets For Feedlot Cattle, C. P. Birkelo, J. Lounsbery
Conventional Versus High Energy Receiving And Step-Up Diets For Feedlot Cattle, C. P. Birkelo, J. Lounsbery
South Dakota Beef Report, 1993
Two hundred sixty-four yearling steers with an initial average weight of 730 Ib were randomly allotted to 24 pens and fed ad libitum either conventional (CONV) receiving or step-up diets (hay content decreased from 50% to 40, 30, 20, and 10% of diet dry matter) or high energy (HE) diets (hay content was maintained throughout at 10% but wet corn distillers grain (WDG) decreased from 43% to 30, 20, 10, and 0%). The feeding of WDG in place of hay was designed to maximize energy intake while not overloading the rumen with starch during the grain adaptation period. Long grass …
Genetic Parameters For Carcass Traits In Beef Cattle, D. M. Marshall
Genetic Parameters For Carcass Traits In Beef Cattle, D. M. Marshall
South Dakota Beef Report, 1993
The recent scientific literature was reviewed to summarize genetic parameters for carcass traits in beef cattle. Heritability estimates were generally moderate to large, in agreement with previous literature estimates. This suggests good potential for making change through genetic selection for a given individual carcass characteristic. However, genetic improvement through multiple-trait selection would be slowed by several important genetic antagonisms between traits, suggesting the use of terminal breeding systems with complementary sire and dam genetic types. Individual and maternal heterosis estimates from age-constant analyses were numerically positive and quite large for fat thickness and tended to be numerically positive and small …
Maternal Performance Of First-Calf Crossbred Beef Cowns In Relation To Sire Expected Progeny Differency (Epds), D. M. Marshall, M. B. Long
Maternal Performance Of First-Calf Crossbred Beef Cowns In Relation To Sire Expected Progeny Differency (Epds), D. M. Marshall, M. B. Long
South Dakota Beef Report, 1993
Cumulative milk production of crossbred daughters of sires of several breeds was estimated using weigh-suckle-weigh procedures. Pooled-across-breed analyses were conducted to determine, in retrospect, relationships of sire expected progeny difference (EPD) values for milk and total maternal value to daughter milk yield and daughter's offspring weaning weight. The pooled coefficient for regression of daughter 214-day milk yield sire milk EPD was 13.4 Ib/lb (residual correlation was .14). The overall mean estimated milk yield was 2,782 Ib, suggesting that a difference in sire milk EPD of 1 Ib corresponded to a difference of approximately 5% in cumulative daughter milk yield. The …
Net Energy Of Soybean Mill Run For Growing Cattle, C. P. Birkelo, D. Thomson
Net Energy Of Soybean Mill Run For Growing Cattle, C. P. Birkelo, D. Thomson
South Dakota Beef Report, 1993
The objective of the experiment was to estimate the net energies for maintenance (NEm) and gain (NEg) of soybean mill run (SMR), a by-product typically containing about 90% soyhulls. Six steers with an average weight of 288 kg were alternately fed pelleted test diets at intakes varying from 3.6 to 9.4 kg per day in an energy balance experiment arranged in a crossover design. The test diets contained either 96.6% alfalfa (ALF) or 46.6% alfalfa and 50.0% soybean mill run (ALFSMR). Energy intake from feed and losses in feces and urine were determined from total collections. Energy lost as methane …